A182083 - OEIS

%I #9 Apr 11 2012 11:16:40

%S 6,24,120,840,3240

%N Number of cocyclic Hadamard matrices over Z_(2*n+1) X Z^2_2.

%C The precise form of cocyclic Hadamard matrix is given by Eq. (12) on page 131 of [Baliga, et al.].

%H A. Baliga and K. J. Horadam, <a href="http://ajc.maths.uq.edu.au/pdf/11/ocr-ajc-v11-p123.pdf">Cocyclic Hadamard matrices over Z_t X Z^2_2</a>, Australas. J. Combin. 11(1995), 123-134.

%Y Cf. A182068.

%K nonn,hard,more

%O 0,1

%A _L. Edson Jeffery_, Apr 10 2012